• Journal of the Korean Association of Geographic Information Studies
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• v.22 no.1
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• pp.129-139
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• 2019

Mapping urban areas using the earth observation satellites is useful for monitoring urban expansions and measuring urban developments. In this research, the different thresholds for detecting the urban areas separately from the remote-sensing index images (normalized-difference built-up index(NDBI) and urban index(UI) images) generated from the Landsat-8 image acquired in Daegu, South Korea were evaluated through the following steps: (1) the NDBI and UI images were separately generated from the given Landsat-8 image; (2) the different thresholds (-0.4, -0.2, and 0) for detecting the urban areas separately from the NDBI and UI images were evaluated; and (3) the accuracy of each detected urban area was assessed. The experiment results showed that the threshold -0.2 had the best performance for detecting the urban areas from the NDBI image, while the threshold -0.4 had the best performance for detecting the urban areas from the UI image. Some misclassification errors, however, occurred in the areas where the bare soil areas were classified into urban areas or where the high-rise apartments were classified into other areas. In the future research, a robust methodology for detecting urban areas, including the various types of urban features, with less misclassification errors will be proposed using the satellite images. In addition, research on analyzing the pattern of urban expansion will be carried out using the urban areas detected from the multi-temporal satellite images.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2017.10a
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• pp.76-78
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• 2017

본 연구는 비산 2 3동의 골목정원 조성지역과 비조성지역의 주민들을 대상으로 골목현황 및 주민의식을 분석하고, 이를 통해 골목정원 조성이 골목환경에 미치는 영향을 분석하고자 하였다. 연구결과를 살펴보면, 조성지역은 11개의 골목정원과 22개의 주제정원이 조성되어 있으며, 비조성지역은 서부시장을 중심으로 한 프랜차이즈 특화거리가 조성 중에 있다. 골목환경 구성요소의 중요도는 두 지역 모두 조명시설, CCTV 등 안전과 관련된 항목이 높게 평가되었으며, '공방 등 체험, 전시 및 공연시설', '텃밭', '항아리, 장식품 등 조형물' 등 개인 여가생활과 관련된 항목은 낮게 분석되었다. 만족도의 경우 조성지역은 골목정원 조성으로 개선된 조명시설, 초화류 등과 같은 항목이 높게 나타났다. 비조성지역의 경우 19개 항목의 만족도가 모두 낮게 분석되어 전반적으로 골목환경에 대해 불만족하는 것으로 분석되었다. 이를 바탕으로 개선방안을 제시하면, 조성지역은 CCTV 추가설치 및 빈집정비를 통해 골목의 안전성 확보와 휴게 및 교류공간 조성이 필요할 것으로 판단된다. 비조성지역의 경우 전반적인 골목환경 개선이 필요하며, 조명시설의 추가 설치가 필요할 것으로 사료된다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.10
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• pp.22-28
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• 2007

This paper presents an interruption cost model of the feeder considering the local characteristics. KERI's survey results for the customers interruption cost are used through the research. Interruption cost of the feeder in a city is calculated in the ratio of customer's types. The customers consists of residencial, commercial, industrial and public type. The proposed method is applied to calculate interruption cost of the feeder in a small city and a metropolitan aria.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2007.05a
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• pp.417-420
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• 2007

This paper proposes a method to calculate the amount of the CO2 emission w.r.t. generator MW output using the input-output coefficients of the thermal power plants. A calculation of CO2 emission for an LNG fired combined cycle power plant is demonstrated.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.19 no.1
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• pp.40-43
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• 2005

This paper presents the minimization of the fuel cost by optimal allocation of P-Q generation in a three-bus sample system. Derivation of the system loss sensitivities by optimization technique is introduced. The loss sensitivities are substituted into the optimality conditions and the optimal P-Q allocation is computed to obtain the minimal fuel cost.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.6
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• pp.85-90
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• 2014

This paper shows a reasonable demand power, that was made by the systematic and statistical way considering actual conditions, such as investigated transformer capacity and peak power for the last 6 years of subway substation customer as to AMR. In this dissertation, it is necessary to analyze the key features and general trend from the investigated data. It made an analysis of the feature parameters, such as average, standard deviation, median, maximum, minimum and thus it was carried by the linear and nonlinear regression analysis. And we studied on the application of a BESS. Analysis showed that the revulsion of capital is about 3 years and 4 months.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.19 no.5
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• pp.74-79
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• 2005

In this paper the earth structures of four cities are analysed on the basis of the measured soil resistivity and the characteristics of a grounding system is examined. As a result it is revealed that the soil resistivity has an effect on touch voltage and step voltage, which are directly related to safety, as well as ground resistance.

• Journal of the Korean Association of Geographic Information Studies
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• v.16 no.3
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• pp.164-179
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• 2013

Ulaanbaatar city, the capital of Mongolia and the center of Mongolian economy, increasingly needs to have a long-term urban planning and a system to impose a tax on land effectively as insufficient development of land and the moving of nomad into urban areas increases during its rapid growth. Therefore, Mongolian government has to prepare a land management system which provides the infrastructure to improve work efficiency and service quality by integrating digitalized data about land and main facilities and sharing data between related departments. This research analyzed the environment to operate the existing land management system and working environment and redesigned database. Furthermore, it integrated all the existing systems, configured service network, and made working environment for land registration, land permission, land payment management to be processed online. With this, it provides the foundation to improve quality of people's life through the preparation of long term urban planning, clean tax administration of real estate, and reconsideration of efficiency about urban infrastructure investment.

• Journal of the Korea Convergence Society
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• v.8 no.4
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• pp.159-165
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• 2017

The purpose of this study is to analyze the 'Scenery of the Modern City' revealed by Korean films of 1930 40s. It is assumed that films always reflect the cityscape and human activities of those days. For the analysis, a pool of 8 Korean films from 1934 till 1944 was constructed. In these films, the sceneries of the city were represented as the following: 1) The cityscape including modern buildings and speedy transportation was intentionally represented to express visually the city of Gyeongseong under the wave of modernization. 2) The western-style architectural spaces, such as apartment, mansion, department store, cafe, and hotel, were emphasized to reflect the curiosity and longing of the general public for western culture and lifestyle.

• Korean Journal of Remote Sensing
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• v.20 no.6
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• pp.397-408
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• 2004

In this study, surface temperature which was extracted from Landsat TM band 6 was compared and analyzed with the AWS(Automatic Weather System) observation data for studying urban heat environment properties with possibility of remote sensing data application. In order to verification of the distribution properties of urban surface temperature, correlation analysis between surface temperature and NDVI, the distribution properties of urban surface temperature by land use/cover patterns were carried out by GIS spatial analysis techniques. The results presented that the spatial distribution of urban surface temperature was very different depending on various land use/cover patterns of surrounding areas. Also there was the reverse linear relationship between surface temperature and NDVI. These results will be worked as one of the major factors for environmentally sustainable urban planning considering the characteristics of weather environments in the near future.